Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cee8088a0b142d…

MALICIOUS

PDF

116.8 KB Created: 2021-04-08 02:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9852ee17bc84088f2c8be2e4ab33ec88 SHA-1: 2841bd520d72ef4dd3f4e6abc6206a98948411a4 SHA-256: 71cee8088a0b142de835bd6c6bf73c79f940ecd577112729dbede0ba35bd9376
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/strik?utm_term=is+tokyo+ghoul+season+3+the+last+season PDF link annotation
    • http://inostrana.com/resume_template_free_online_word1p46w.pdfIn PDF document text
    • http://fringigejy.site/368172221049mz4p.pdfIn PDF document text
    • https://fogipomovilop.weebly.com/uploads/1/3/4/0/134018275/gezozokanaroberil.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/sICvgjW/40122698621.pdfIn PDF document text
    • http://artyom.guru/1845836709gfj9r.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/40297781766.pdfIn PDF document text
    • http://moneyindia.site/how_to_dye_hair_with_tissue_paperh6plz.pdfIn PDF document text
    • http://virona.org/test_to_find_out_bearing_capacity_of_soilldoyb.pdfIn PDF document text
    • http://service-hire.com/tai_chi_24_form_step_by_step_instructions_paragraph_22i4st.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/2993862.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/aZiiihc/ginuxajaburamolavomalika.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/61637919181.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/jjwhjMt/fupuzoko.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/2368301.pdfIn PDF document text
    • http://voirlo.xyz/tachycardie_atriale_focale04zh0.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/child_development_and_pedagogy_notes_in_english_free_download.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/88025964198.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/8063745.pdfIn PDF document text
    • http://kedepoba.sportsontheweb.net/litomutixozuda.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/5704059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://piwolimosopobu.myartsonline.com/29951994788.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/48769837537.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/41378809950.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11052 36072 bytes
SHA-256: d5fedf6f37fb37c4990777fe59c1daeefd23b787874849bfdc913b381215b270
font_01_sfnt_off0001809b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1809B 4952 bytes
SHA-256: 3ec5242e8781ed8c9325626e1517cd2808f2ef57d1e195d0657a81a06cbcbc8c
font_02_sfnt_off00019179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19179 11176 bytes
SHA-256: 908ecd54a959138530ddd118dd7967a02fb243d1d8e919ac728fc7937fb641d3
font_03_sfnt_off0001b681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B681 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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